Title :
Spectral gain narrowing in THz quantum cascade lasers
Author :
Dhillon, S. ; Jukam, N. ; Oustinov, D. ; Zhao, Z.-Y. ; Hameau, S. ; Barbieri, S. ; Vasanelli, A. ; Filloux, P. ; Marcadet, X. ; Sirtori, C. ; Tignon, J.
Author_Institution :
Lab. Pierre Aigrain, Ecole Normale Super., Paris
Abstract :
Terahertz time-domain spectroscopy is used to determine gain related parameters of terahertz quantum-cascade lasers. Due to the techniquespsila insensitivity to the QCL emission, spectral gain narrowing is observed above laser threshold. By correlating these measurements with bandstructure simulations, insight into the subband alignment as a function of the applied field is acquired.
Keywords :
band structure; laser beams; quantum cascade lasers; submillimetre wave lasers; terahertz spectroscopy; bandstructure simulations; laser threshold; spectral gain narrowing; terahertz quantum cascade lasers; terahertz time-domain spectroscopy; Frequency; Laser transitions; Lasers and electrooptics; Optical pulses; Power lasers; Pulse amplifiers; Quantum cascade lasers; Semiconductor lasers; Spectroscopy; Stimulated emission;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves, 2008. IRMMW-THz 2008. 33rd International Conference on
Conference_Location :
Pasadena, CA
Print_ISBN :
978-1-4244-2119-0
Electronic_ISBN :
978-1-4244-2120-6
DOI :
10.1109/ICIMW.2008.4665460
